Even if you know the industries that will grow exponentially, it doesn't guarantee stock success. I've just recently seen an episode of Haven, where one guy gets sent into the past and tells his grandpa to "invest in the microprocessor". I immediately thought "what does that mean?! Invest in Intel...or VIA?". What he said would is no different than saying a few years ago "invest in smartphones".

So if I tell you nanotechnology, biotechnology and 3d printing are "the future", in which company do you invest now?